2014 TOYOTA TUNDRA engine

2304-5. Using the driving support systems
If the rear wheels spin, the slip
indicator flashes to indicate that
the AUTO LSD system has con-
trolled the spinning of the rear
wheels.
■If the engine is turned off and restarted
The AUTO LSD system and the indicators are automatically turned off.
■ If the brake system overheats
The AUTO LSD system will cease operation, and the slip indicator will
change from flashing to being on continuously to alert the driver. Stop the
vehicle in a safe place. (There is no problem with continuing normal driving.)
The system will be automatically restored after a short time.
When the AUTO LSD system is operating
CAUTION
■To avoid an accident
● Do not use the AUTO LSD system in conditions other than the above.
A much greater steering effort and more careful cornering control will be
required.
● Do not drive with the AUTO LSD system continuously turned on.

2314-5. Using the driving support systems
4
Driving
Driving assist systems
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly,
or if the brakes are applied while driving on a slippery road surface
◆Brake assist
Generates an increased level of braking force after the brake pedal
is depressed when the system detects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or
turning on slippery road surfaces
◆Trailer Sway Control
Helps the driver to control trailer sway by selectively applying brake
pressure for individual wheels and reducing engine torque when
trailer sway is detected.
Trailer Sway Control is part of the VSC system and will not operate if
VSC system is turned off or experiences a malfunction.
◆TRAC (Traction Control) for 2WD models and 2WD mode on
4WD models
Helps to maintain drive power and prevent the drive wheels from
spinning when starting the vehicle or accelerating on slippery roads
◆A-TRAC (Active Traction Control) for 4WD mode on 4WD mod-
els
Maintains drive power and prevents all wheels from spinning when
starting the vehicle or accelerating on slippery roads.
To help enhance driving safety and performance, the following
systems operate automatically in response to various driving
situations. Be aware, however, that these systems are supple-
mentary and should not be relied upon too heavily when operat-
ing the vehicle.

2324-5. Using the driving support systems
The slip indicator light will flash
while the TRAC/VSC/A-TRAC/
Trailer Sway Control systems are
operating.
If the vehicle gets stuck in fresh s now or mud, VSC/Trailer Sway Con-
trol/TRAC systems may reduce power from the engine to the wheels.
You may need to turn the system off to enable you to rock the vehicle
in order to free it.
■TRAC off mode
Press the VSC off switch.
The “AUTO LSD” indicator will
come on.
The system is in TRAC off and
AUTO LSD, VSC, Trailer Sway
Control on mode.
Press the switch again to turn
the system back on.
When the TRAC/VSC/A-TRAC/Trailer Sway Control systems are
operating
Disabling the VSC/Trailer Sw ay Control/TRAC systems (2WD
models and 2WD mode on 4WD models)

2344-5. Using the driving support systems
If the vehicle gets stuck in fresh s now or mud, VSC/Trailer Sway Con-
trol/A-TRAC systems may reduce power from the engine to the
wheels. You may need to turn the system off to enable you to rock the
vehicle in order to free it.
■A-TRAC off mode
Press the VSC off switch.
Vehicles without multi-informa-
tion display: The “TRAC OFF”
indicator will come on.
Vehicles with multi-information
display: The “TRACTION CON-
TROL OFF” will be shown on
the display.
The system is in A-TRAC off
and VSC, Trailer Sway Control
on mode.
Press the switch again to turn
the system back on.
Disabling the VSC/Trailer Sway Control/A-TRAC systems (4H
mode on 4WD models)
Vehicles without multi-infor-
mation display
Vehicles with multi-information
display

2364-5. Using the driving support systems
If the vehicle gets stuck in fresh snow or mud, A-TRAC system may
reduce power from the engine to the wheels. You may need to turn
the system off to enable you to rock the vehicle in order to free it.
Stop the vehicle completely,
and press the VSC off switch
for more than 3 seconds.
Vehicles without multi-informa-
tion display: The “TRAC OFF”
indicator will come on.
Vehicles with multi-information
display: The “TRACTION CON-
TROL OFF” will be shown on
the display.
Press the switch again to turn
the system back on.
Disabling the A-TRAC syste m (4L mode on 4WD models)
Vehicles without multi-infor-
mation display
Vehicles with multi-information
display

2374-5. Using the driving support systems
4
Driving
■When the “TRAC OFF” indicator light comes on or the message is dis-
played on the multi-information disp lay showing that “TRACTION CON-
TROL OFF” has been disabled even if the VSC off switch has not been
pressed
TRAC cannot be operated. Contact your Toyota dealer.
■ Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC, A-
TRAC and Trailer Sway Control systems
● A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the engine is started or just after the vehicle
begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
● Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■ Reactivation of the TRAC/VSC/A-T RAC/Trailer Sway Control systems
Even after the TRAC/VSC/A-TRAC/Trailer Sway Control systems have been
turned off, turning the engine switch off and then on again will automatically
reactivate the TRAC/VSC/A-TRAC/Trailer Sway Control systems.
■ Reactivation of the TRAC system linked to vehicle speed
When only the TRAC system is turned off, the TRAC system will turn on
when vehicle speed increases. However, when both TRAC/VSC systems are
turned off, the systems will not turn on even when vehicle speed increases.
■ If the brake system overheats
TRAC or A-TRAC will cease operation, and the slip indicator will change from
flashing to being on continuously to alert the driver. Stop the vehicle in a safe
place. (There is no problem with continuing normal driving.)
■ Shifting to “4L”
VSC and Trailer Sway Control are automatically turned off.

2404-6. Driving tips
Winter driving tips
●Use fluids that are appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Washer fluid
● Have a service technician ins pect the condition of the battery.
● Have the vehicle fitted with four snow tires or purchase a set of tire
chains for the rear tires.
Ensure that all tires are the same size and brand, and that chains match
the size of the tires.
Perform the following accordin g to the driving conditions:
● Do not try to forcibly open a window or move a wiper that is frozen.
Pour warm water over the frozen area to melt the ice. Wipe away
the water immediately to prevent it from freezing.
● To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
● Check for and remove any excess ice or snow that may have accu-
mulated on the exterior lights, ve hicle’s roof, chassis, around the
tires or on the brakes.
● Remove any snow or mud from the bottom of your shoes before
getting in the vehicle.
Accelerate the vehicle slowly, keep a safe distance between you and
the vehicle ahead, and drive at a reduced speed suitable to road con-
ditions.
Carry out the necessary preparations and inspections before
driving the vehicle in winter. Always drive the vehicle in a man-
ner appropriate to the prevailing weather conditions.
Preparation for winter
Before driving the vehicle
When driving the vehicle

2414-6. Driving tips
4
Driving
Park the vehicle and move the shift lever to P without setting the park-
ing brake. The parking brake may freeze up, preventing it from being
released. If necessary, block the wheels to prev ent inadvertent sliding
or creeping.
Observe the following precautions when switching fuels, in order to
maintain starting and driving performance.
● Do not change fuels when the fuel level is 1/4 or less.
● Always add at least 2.6 gal. (10 L) of fuel.
● After filling up with fuel, warm up the engine or drive the vehicle for
at least 5 minutes or 7 miles (11 km).
● Do not accelerate rapidly immediately after refueling.
Use the correct tire chain size when mounting the tire chains.
Chain size is regulated for each tire size.
Side chain
(0.2 in. [5 mm] in diameter)
Cross chain
(0.25 in. [6.3 mm] in diameter)
Regulations regarding the use of tire chains vary depending on loca-
tion and type of road. Al ways check local regulations before installing
chains.
When parking the vehicle
Refueling (Flex-fuel vehicles)
Selecting tire chains
1
2
Regulations on the use of tire chains